What question did this study set out to answer?

To describe the newly isolated bacterium Paenibacillus hebaui sp. nov. and its distinct characteristics.

April 11, 2026INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY0 citations

Paenibacillus hebaui sp. nov., a psychrotolerant and cellulolytic-xylanolytic bacterium isolated from high-coverage grassland soil in the Qinghai–Tibet Plateau

Key Points

To describe the newly isolated bacterium Paenibacillus hebaui sp. nov. and its distinct characteristics.
Isolation from soil samples in the Qinghai-Tibet Plateau
Phylogenetic analysis using 16S rRNA gene sequencing
Genomic comparisons assessing ANI and DNA G+C content
Chemotaxonomic analysis of fatty acids and lipids
Identified as a novel Gram-positive bacterium with 98.67% 16S rRNA similarity to Paenibacillus xylanexedens
Confirmed taxonomic novelty through genomic comparisons indicating ANI<84.4%
Motile rods with unique growth parameters (10-40 °C, pH 6-12, 0-4% NaCl)
Dominant fatty acids include anteiso-C15:0 and iso-C16:0

Abstract

A novel Gram-positive bacterium, Paenibacillus hebaui sp. nov. (QZ-Y1T), was isolated from soil samples in the Qinghai-Tibet Plateau, China. Phylogenetic analysis of its 16S rRNA gene (PV459073.1) showed 98.67% similarity to Paenibacillus xylanexedens B22aT, whereas genomic comparisons (ANI15 : 0 and iso-C16 : 0, core polar lipids (Diphosphatidylglycerol, Phosphatidylglycerol and Phosphatidylethanolamine), respiratory quinone MK-7 and meso-diaminopimelic acid (A1γ-type). Genomic comparisons (7.20 Mb) and phenotypic differentiation support its classification as a novel species. The type strain QZ-Y1T (=CCTCC AB 2025086T=KCTC 43838T) expands the ecological and taxonomic diversity of Paenibacillus.

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